Induction Heating Support Structure with Repeating Coil and Capacitor
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Solution Overview
Problem
Induction heating devices face challenges in efficiently heating objects with concave surfaces, such as woks, due to the need for large resonance currents and the lack of a support structure that can effectively transmit heat and control temperature, especially when the distance between the object and the working coil is significant and the support structure lacks a capacitor.
Innovation Solution
A support structure for induction heating devices that includes a housing with a recessed upper surface, a repeating coil inside for magnetic induction or resonance, and a compensation capacitor to control the coil's output, along with a temperature sensor and communication module for wireless temperature feedback, allowing efficient energy transfer and improved temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cup-shaped jig with repeating coils is used to heat objects with concave surfaces, then heating capability for various cooking vessels is improved, but the device becomes large and heavy, causing inconvenience for storage and transportation
Solution Approach 1:
The support structure is divided into modular components including a housing, repeating coil assembly, and capacitor that can be independently positioned and configured. This segmentation allows the system to maintain versatility for heating different vessel types while optimizing the spatial arrangement to reduce overall size and weight.
Solution Approach 2:
The support structure is designed with universal functionality to accommodate various cooking vessels including woks, pots, and pans through its concave housing design and adjustable coil configuration. The same structure serves multiple heating purposes without requiring separate specialized equipment for each vessel type, thereby reducing the need for multiple heavy devices.
2Adaptability or versatility
If the distance between the object and the working coil is increased to accommodate various vessel shapes, then adaptability is improved, but heating efficiency is degraded
Solution Approach 1:
A repeating coil is introduced as an intermediary element between the working coil and the cooking vessel. This repeating coil maintains close proximity to the vessel bottom for efficient heating while being positioned within the housing structure that provides adaptability for various vessel shapes. The intermediary coil transfers energy effectively regardless of the distance between the main working coil and the vessel.
Solution Approach 2:
The solution transitions from a single-plane heating approach to a multi-dimensional configuration where the repeating coil is positioned vertically between the working coil and the vessel bottom. This vertical arrangement allows the system to maintain heating efficiency across different vessel geometries by optimizing the spatial relationship in the vertical dimension while the housing provides horizontal adaptability.
3Productivity
If a support structure with repeating coils is used to heat objects, then heating capability is improved, but resonance current requirements increase, requiring larger current magnitude
Solution Approach 1:
The system optimizes resonance parameters by carefully selecting the capacitance value of the compensation capacitor and adjusting the operating frequency to match the resonant frequency of the repeating coil circuit. By changing these parameters, the system achieves efficient heating at lower current magnitudes, avoiding the need for excessively large resonance currents while maintaining effective heating capability.
4Device complexity
If a support structure without a capacitor is used, then device simplicity is improved, but temperature control capability is insufficient for heating various cooking vessels as intended
Solution Approach 1:
A temperature sensor is integrated into the support structure to provide real-time feedback on the temperature of the cooking vessel. This feedback is used by the control unit to adjust the power delivered to the repeating coil, enabling precise temperature control. The feedback mechanism allows the system to adapt to different vessel types and cooking requirements without significantly increasing structural complexity.
Solution Approach 2:
The support structure incorporates dynamic control capabilities where the power delivery to the repeating coil can be adjusted in real-time based on temperature feedback and detected vessel properties. This dynamic adjustment enables the system to optimize heating performance for various cooking vessels while maintaining a relatively simple overall structure, as the complexity is managed through software control rather than additional hardware components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The support structure efficiently transmits the induction heating device's output to objects like woks, shortening cooking time and improving temperature control efficiency, enabling fixed temperature control for better cooking results.
Implementation Method 1
a repeating coil that is located inside of the housing, that is configured to generate magnetic induction or magnetic resonance with the working coil
Implementation Method 2
a repeating coil that is located inside of the housing, that is configured to generate magnetic induction or magnetic resonance with the working coil
Implementation Method 3
a compensation capacitor located inside of the housing and connected to the repeating coil, where the compensation capacitor is configured to control output of the repeating coil
Data Source
AI summary
Disclosed is a support structure for an induction heating device that includes a working coil configured to heat an object. The support structure includes: a housing including an upper surface that is recessed do inward and that is configured to seat the object; a repeating coil that is located inside of the housing, that is configured to generate magnetic induction or magnetic resonance with the working coil, and that is configured to heat the object on the upper surface of the housing based on magnetic induction or magnetic resonance with the working coil; and a compensation capacitor located inside of the housing and connected to the repeating coil, where the compensation capacitor is configured to control output of the repeating coil.